# 补充你的代码
sign=input()
kuangdu=input()
pi1='3.14'
pi2='3.1415'
pi3='3.1415926'
print(f'圆周率值为：{pi1:{sign}{kuangdu}}')
print(f'圆周率值为：{pi2:{sign}{kuangdu}}')
print(f'圆周率值为：{pi3:{sign}{kuangdu}}')
 